adding circuitpython example for the tft featherwing 3.5 inch v2

Author: BlitzCityDIY

TFT_FeatherWing_V2_CircuitPython_Example/code.py

@@ -0,0 +1,69 @@
+# SPDX-FileCopyrightText: 2023 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+This test will initialize the display using displayio and display
+a bitmap image. The image advances when the touch screen is touched.
+
+Pinouts are for the 3.5" TFT FeatherWing V2
+"""
+import os
+import board
+import displayio
+import adafruit_hx8357
+import adafruit_tsc2007
+
+# Release any resources currently in use for the displays
+displayio.release_displays()
+
+# Use Hardware SPI
+spi = board.SPI()
+
+tft_cs = board.D9
+tft_dc = board.D10
+
+display_width = 480
+display_height = 320
+
+display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs)
+display = adafruit_hx8357.HX8357(display_bus, width=display_width, height=display_height)
+
+i2c = board.STEMMA_I2C()
+
+irq_dio = None
+tsc = adafruit_tsc2007.TSC2007(i2c, irq=irq_dio)
+
+groups = []
+images = []
+for filename in os.listdir('/'):
+    if filename.lower().endswith('.bmp') and not filename.startswith('.'):
+        images.append("/"+filename)
+print(images)
+
+for i in range(len(images)):
+    splash = displayio.Group()
+    bitmap = displayio.OnDiskBitmap(images[i])
+    tile_grid = displayio.TileGrid(bitmap, pixel_shader=bitmap.pixel_shader)
+    splash.append(tile_grid)
+    groups.append(splash)
+
+index = 0
+touch_state = False
+
+display.root_group = groups[index]
+
+while True:
+    if tsc.touched and not touch_state:
+        point = tsc.touch
+        print("Touchpoint: (%d, %d, %d)" % (point["x"], point["y"], point["pressure"]))
+        # left side of the screen
+        if point["y"] < 2000:
+            index = (index - 1) % len(images)
+            display.root_group = groups[index]
+        # right side of the screen
+        else:
+            index = (index + 1) % len(images)
+            display.root_group = groups[index]
+        touch_state = True
+    if not tsc.touched and touch_state:
+        touch_state = False